Gulf of Finland Year 2014 opening, January 21, 2014 S.Kondratyev, A.Ershova Nutrient load estimates in the Russian part of the Gulf of Finland catchment

Gulf of Finland Year 2014 opening, January 21, 2014 S.Kondratyev, A.Ershova

Nutrient load estimates in the Russian part of the

Gulf of Finland catchment

Sergey Kondratyev, Alexandra Ershova

Institute of Limnology, RASRussian State Hydrometeorological University

St.Petersburg, Russia


Lake Ladoga (1)

2/3 of Narva catchment (2)

Neva immediate catchment (3)

Luga catchment (3)

GoF immediate catchment (3)

(unmonitored)

St.Petersburg (WWTPs)

Main components of nutrient load on GoF from Russia


Estimates are based on:

Data for last 5 years (2009-2013) Monitoring data: North-West Hydromet Service, Vodokanal (Luga,

Narva) Longterm observations of Institute of Limnology (Ladoga) Modelling (Neva, Luga) Observations+modelling (2013, GoF imm.catch.)

Work done by IL RAS, RSHU, NLBWA together with SYKE –

contribution to the GoFYear2014


Load from Lake Ladoga with Neva River(nutrient budget of Lake Ladoga)

1 – load from catchment, 2 – internal load, 3 – atmospheric deposition, 4 – retention, 5 – outflow

1000 t Ptot/year40100 t Ntot/year


Outflow from Lake Chudsko-Pskovskoye and Narva Reservoir with Narva River

Ptot и Ntot discharges in Narva River (Ivangorod)

300 t Рtot /year 6500 t Ntot /year


Neva immediate catchment

ILLM – Institute of Limnology Load Model

Model developed for use in conditions of limited monitoring data and its low reliability -a simple model, requiring a minimum of initial information.

790 t Рtot /year 3830 t Ntot /year


Luga catchment

Testing of ILLM model in frames of PRIMER project and BaltHazAR II project, Component 2.2

Mean load from Luga catchment Ptot = 310 t/y Ntot = 5240 t/y


St.Petersburg (WWTPs)

“Vodokanal”:~550 t P/year~10 000 t N/year


GoF immediate catchment (unmonitored)

1 - Peschanaya, 2 - Velikaya, 3 - Chulkovka,4 - Polevaya, 5 – Drema, 6 - Matrosovka, 7 – Gorohovka, 8 – Chernaya__________1877 km2

Southern Catchment – 3903 km2

9 – Strelka, 10 – Shingarka, 11 – Karasta, 12 - Chenaya, 13 - Lebyazhya, 14 – Kovashi, 15 – Volonka, 16 – Sista, 17 – Habolovka_2385 km2

Northern Catchment – 5262 km2

Joint project in 2013: measurements on 17 tributaries of GoF


GoF immediate catchment (unmonitored)

Ptot, t/y Ntot, t/y

Measurements 129 2880

Modelling (for the rest part of the catchment)

115 1880

Direct load from point sources

78 272

Total load on GoF 322 5032


Load source P tot, t/year N tot, t/year

1 Lake Ladoga 1000 40100

2 Lake Chudskoye (Narva river) 300 6500

3 Neva river imm. catchment 790 3800

4 Luga river catchment 310 5240

5 St.Petersburg 550 10000

6 GoF imm. catchment 320 5030

Total 3270 70670

BSAP recommendations on nutrient maximum allowable input in the GoF: 4860 t P/year и 106680 t N/year

Note: estimated load is formed on app. 75% of the GoF catchment area

Results of present assessment and BSAP recommendations

~79% ~66%


Possible ways to reduce nutrient load Diffuse sources: optimization of use of organic

fertilizers

St.Petersburg WWTPs: “Vodokanal” load reduction plan

Point sources: difficult to assess (RusNIP project)


Perspectives and recommendations to improve our knowledge Modernization of data collection system: field works

according to SYKE recommendations – every other week each season

Modernization of the mathematical model, development of a determination-stochastic model of nutrient load allowing to get not only mean annual load values but also parameters of a distribution function of nutrient fluxes and loads that is very important for applied calculations and predictions

Use of climatic scenarios for model predictions


THANK YOU

Documents

Gulf of Finland Year 2014 opening, January 21, 2014 S.Kondratyev, A.Ershova Nutrient load estimates in the Russian part of the Gulf of Finland catchment